Telephone-transmitter.



No. 768,569. PATENTED AUG. 23, 1904. A. J. MUNDY.

TELEPHONE TRANSMITTER.

APPLIOATION FILED Amma, 1902.

N() MODEL. 3 SHEETS-SHEET 1.

l @MILE/147W? No. 768,569. i PATENTED AUG. 23, 1904. A. J. MUNDY.

TELEPHONE TRANSMITTER. AfPLluATloN mmm un. 2a, w02.

N0 MDDEL.

3 SHEETS-SHEET 2.

PATENTBD AUG. 2a, 1904.

A. J. MUNDY.

TELEPHONE TRANSMITTER.

APPLICATION FILED 18.23. 1902. 4

3 SHEETS-SHEETS.

No'MoDBL.

UNITED SfrnfrnsA lPatented August 23, 1904.

PATENT OFFICE.

ARTHUR J. MUNDY, OF BOSTON, lliASSAOllUSElTS ASSGNOR TO SUBMA- JINE SIGNAL COMPANY, OF l'VA'lEltVlLLE, MAINE, A CORPORATION OF MAINE.

TELEPHONE-TRANSNHTTER.

SPECIFICATION forming part of Letters Patent No. 768,569, dated August 23, 1904.

Application filed April Z3, 1902.

To mit m7110111, it may concern:

Be it known that I An'rnn'n J. M Umar, aciti' zen of the United States, and a resident of Boston, in the county of Suiiolk and State of Massachusetts, have invented a new and useful Improvement in Telephorie-Transmitters, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, forming a part, of this specilication, in explaining itsnature.

The invention relates to an electric sound'- transmitting'device for transmitting sounds or sound-vibrations of any kind or articulate speech, whether communicated to it by air or water.

The invention involves the employment of a sound-receiving diaphragm and means for varying electrical resistance, a movable disk to bear against it, and a yielding but unbroken connection between the disk and the diaphragm which permits of the movement. of the disk with the diaphragm or of the dia- 1:hrag1n with respect to the disk, or vice ve rsa. rlhe invention consists 1n two or more sound-receiving diaphraglns, means for varying electrical resistance common to all the diaphragms, and a connection between each .diaphragm and said means for varying electrical resistance comprising disks or surfaces to bear against the same and connected with the diaphragme by a yielding but unbroken ,connection which permits the disks tobev moved with the diaphragme and by them or the movement of the diaphragms independently of the disks or of both movements without breaking the connection between the diaphragms and the disks.

I will now describe the invention in conjunction with the drawings forming a part of this speciiicaticn, wherein- Figure 1 relin'esents a transmitter in which Amy invention is shown as combined with actuating-diaphragms varying in their connec- .ton with the means for varying electrical .resistance as hereinafter specilied. Fig. 2 is a view representing a transmitter in which both diaphragme are combined w ith the means for varying electrical resistance in the same way. Fig. 3 represents the structm'e oi. Fig.:

,Serial No. 104,298. (No model.)

2 when employed as a means for receiving sound-vibrations transmitted by water.

In the drawings, in Fig, 1, A represents a diaphragm adapted to receive. sound-vibrations of any kind, including those oi" articulate speech. .B is a means :for varying the electrical resistance. Oonnninuted carbon is represented; but any other suitable means may he employed'. C' is a disk or other shaped. button or presser held in any desired way and having its inner face in contact with the means 'for varying electrical resistance. This disk is so supported as to he capable of vibratory movement. It is connected with the diaphragm A by means of a short post c, extending from its outer side forward and preferably eentrall'y arranged thereon and of uniform' size or diameter throughout, and the-end of which preferably does not come inte contact with the diaphragm A. Upon the inner surface of the diaphragm A are a. number of' lingers a, the outer ends of which are free and' yielding and which bear against or upon the surface c' of the post c. These lingers e are of any suitable material having sullicient spring to hold their ends in contact with the sides of the post c', upon .which they may move without breakingtheir contact therewith. As many of these spring lingers or arms may he used as desired. `hey extend, preferably,fr0m near the center of the sound-receiving daphragm A and by their engagement with the post permit vibrations of the diaphragm to be transmitted to the means for varying electrical resistance either by the vibra-tory movement of the disk C with thediaphragm, such as would occur did the arms or lingers ct not by the vibratory movement of said lingers e upon the post or by a vibratory action which should be partly produced by the movement of the lingers upon the post andpartly by the movement of the post and disk with the lingers, although not necessarily to the same extent.

varying electrical resistance which is couimon to a number of sound or vibration receiving diaphragms. rlwo such are shown.

nieve on the post c, or as would be produced In Fig. 2l. have represented a means f0r95 ance, e vibratory disk er surface. to bear against said means for varying electrical re sistance, and having interposed between it and the vibratory diaphragm a horizontal Studer post upon one, and Iyielding fingers to constantly bear against the sides of thc post upon the other. v

8. The improved electric soi'ind-transmitter herein described` comprising a vibratorir diaphragm, a means Jfor varying electrical resistance, a vibratory disk or surface te bear against said means for varying electrical resistance, and a yielding connection between said disk and said diaphragm for permitting one to be moved with respect to the other with# out breaking the connection between them, said connection being between fixed points of' the surfaces of said disk and diaphragm.

9. The improvedelectric sound-transmitter for submarine use herein described, the same comprising two vibratery diaphragme eppositely arranged, each of which has its outer surface in contact with the water or other finid, a means for varying electrical resistance common to bothsaid diaphragme, e vibratory disk or plateior .each diaphragm to bear against said means for varying electrical re;

sistance upon opposite sides thereof, and

means for attaching cach disk or plate to its diaphragm which permits one to be moved without respect to the other without breaking the connection between them.

. ARTHUR J. MUNDY.

W itnesses:

F. F. RAYMOND, 2d., J'. M. DoLAN. 

